Pressure relief device of switch cabinet

Abstract

The utility model relates to the technical field of pressure relief of switch cabinets, in particular to a pressure relief device of a switch cabinet, which comprises a cabinet body, a vent hole arranged at the top of the cabinet body, a pressure relief sleeve arranged at the top of the cabinet body, a fixing rod arranged between side walls of an inner cavity of the pressure relief sleeve, a sliding column connected with the fixing rod, and a sealing plate arranged at the top of the sliding column. The top of the fixed rod is connected with a rotating sleeve, the outer wall of the rotating sleeve is fixedly connected with an exhaust fan blade, the bottom of the sliding column is provided with a limiting block, and the outer wall of the fixed rod is sleeved with a spring. When the pressure intensity in the cabinet body is increased, the pressure intensity in the cabinet body can jack up the sealing plate and the sliding column along the fixed rod, so that the sealing plate is separated from the pressure relief sleeve; and when the air flows for pressure relief, the air exhaust fan blades and the rotating sleeve can be driven to rotate, so that the air in the cabinet body can be quickly exhausted through the air exhaust fan blades, the pressure relief efficiency of the cabinet body is improved, the pressure in the cabinet body can be quickly reduced, and the safety is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to switchgear pressure relief technical field, especially switchgear pressure relief device. BACKGROUND

[0002] Switch cabinet is a kind of large electric appliance, and it has a large number of electronic components inside, which will generate a large amount of heat when working;When working normally, these heat will be dissipated through the heat dissipation holes on the cabinet body of switch cabinet.But, once the internal components of switch cabinet fail, a large amount of heat and pressure will be generated, and the heat dissipation holes on the cabinet body of switch cabinet cannot quickly release the energy inside the cabinet body, which may cause the danger of explosion of switch cabinet, and bring huge security risks and economic losses. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a switch cabinet pressure relief device, which can quickly discharge the gas in the cabinet body and improve the pressure relief efficiency.

[0004] In order to solve the above technical problems, the utility model adopts the technical scheme that:

[0005] A switch cabinet pressure relief device, comprising a cabinet body, a ventilation hole is formed in the top of the cabinet body, a pressure relief sleeve is installed on the top of the cabinet body and communicates with the ventilation hole, a fixed rod is installed between the inner wall of the pressure relief sleeve, a sliding column is slidably connected to the fixed rod and penetrates the fixed rod, a sealing plate is installed on the top of the sliding column and cooperates with the pressure relief sleeve, a rotating sleeve is rotatably connected to the top of the fixed rod, and one end of the sliding column penetrates the rotating sleeve, a suction fan blade is fixed to the outer wall of the rotating sleeve, a limiting block is installed at the bottom of the sliding column, a spring is sleeved on the outer wall of the fixed rod, and the spring is located between the fixed rod and the limiting block.

[0006] Further, a pressure relief plate is installed on the top of the pressure relief sleeve, a plurality of pressure relief holes are formed in the pressure relief plate, one end of the fixed rod penetrates the pressure relief plate and is connected with the sealing plate, and a sealing column is installed at the bottom of the sealing plate and cooperates with the pressure relief hole.

[0007] Further, a rubber sleeve is wrapped on the outer wall of the sealing column.

[0008] Further, a driving motor is installed at the bottom of the fixed rod, the output end of the driving motor penetrates the fixed rod and is provided with a driving gear, and a driven gear is installed on the outer wall of the rotating sleeve and is meshed with the driving gear.

[0009] Further, a switch is electrically connected with the driving motor and installed on the inner wall of the pressure relief sleeve, and an extrusion rod is arranged on the side wall of the limiting block and cooperates with the switch.

[0010] Further, the switch is a boat-shaped switch, and an arc-shaped surface matched with a key of the boat-shaped switch is arranged at an end of the extruding rod.

[0011] Further, the outer wall of the limiting block and the inner wall of the pressure relief sleeve are connected through a limiting rod in a sliding mode.

[0012] Further, a roller is arranged at an end of the limiting rod.

[0013] Further, a sliding hole matched with the sliding column is arranged in the inner wall of the rotating sleeve, and the sliding column and the sliding hole are connected in a sealed sliding mode.

[0014] Further, the rotating sleeve and the fixed rod are connected through a rotating bearing in a rotating mode.

[0015] The utility model discloses the beneficial effect lies in:

[0016] When the pressure in the cabinet body is increased, the pressure in the cabinet body can lift the sealing plate and the sliding column along the fixed rod, so that the sealing plate is separated from the pressure relief sleeve, thereby making the high-pressure gas in the interior flow to release pressure, and when the gas flows to release pressure, the air extraction fan blade and the rotating sleeve can be driven to rotate, so that the air in the cabinet body is quickly extracted through the air extraction fan blade, thereby improving the pressure relief efficiency of the cabinet body, making the interior of the cabinet body can be quickly depressurized, and safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of ring main unit of the utility model;

[0018] Figure 2 It is the structure schematic diagram of ring main unit of the utility model;

[0019] Figure 3 It is the structure schematic diagram of ring main unit of the utility model;

[0020] Figure 4 It is Figure 3 It is the structure enlarged diagram of A place in the utility model;

[0021] Label explanation:

[0022] 1, cabinet body, 2, ventilation hole, 3, pressure relief sleeve, 4, fixed rod, 5, sliding column, 6, sealing plate, 601, sealing column, 7, rotating sleeve, 8, air extraction fan blade, 9, limiting block, 10, spring, 11, pressure relief plate, 12, pressure relief hole, 13, drive motor, 14, driving gear, 15, driven gear, 16, switch, 17, extruding rod, 18, limiting rod, 181, roller. DETAILED DESCRIPTION

[0023] In order to describe the technical content of the utility model, the purpose and effect realized, the following will be described in combination with the embodiments and the accompanying drawings.

[0024] Please refer to Figure 1 The utility model adopts the technical scheme that:

[0025] A switchgear pressure relief device, including the cabinet, the cabinet top is equipped with the ventilation hole, the cabinet top is installed with the pressure relief sleeve that communicates with ventilation, the pressure relief sleeve inner chamber lateral wall between installing has the fixed link, the fixed link on slidingly connected with the sliding column, and sliding column penetrates the fixed link, the sliding column top is installed with the sealing plate that cooperates with the pressure relief sleeve, the fixed link top rotatably connected with the rotating sleeve, and the one end of sliding column passes through the rotating sleeve, the rotating sleeve outer wall is fixed with the air extraction fan blade, the sliding column bottom is installed with the limit block, the fixed link outer wall is equipped with the spring, and the spring is located between the fixed link and the limit block.

[0026] From the above description, the utility model has the beneficial effect that:

[0027] When the pressure in the cabinet body increases, the pressure in the cabinet body can lift the sealing plate and the sliding column along the fixed link, so that the sealing plate is separated from the pressure relief sleeve, thereby making the high-pressure gas inside flow to relieve pressure, and when the gas flows to relieve pressure, the air extraction fan blade and the rotating sleeve can be driven to rotate, so that the gas inside the cabinet body is quickly extracted through the air extraction fan blade, thereby improving the pressure relief efficiency of the cabinet body, enabling the internal pressure of the cabinet body to be quickly reduced, and ensuring safety.

[0028] Further, the pressure relief sleeve top is installed with the pressure relief plate, a plurality of pressure relief holes are formed in the pressure relief plate, one end of the fixed link penetrates the pressure relief plate and is connected with the sealing plate, and the sealing plate bottom is installed with the sealing column matched with the pressure relief hole.

[0029] From the above description, the structure that the pressure relief hole and the sealing column are matched with each other is adopted, so that when the pressure in the cabinet body is normal, the sealing column inserted into the pressure relief hole can effectively prevent external dust from entering the cabinet body.

[0030] Further, the outer wall of the sealing column is wrapped with a rubber sleeve.

[0031] From the above description, the rubber sleeve improves the sealing between the sealing column and the pressure relief hole.

[0032] Further, the fixed link bottom is installed with a driving motor, the output end of the driving motor penetrates the fixed link and is installed with a driving gear, and the outer wall of the rotating sleeve is installed with a driven gear meshed with the driving gear.

[0033] From the above description, it can be seen that when pressure relief, the driving motor can drive the driving gear to rotate, thereby driving the driven gear and the exhaust fan blade to rotate, thereby realizing efficient exhaust pressure relief treatment.

[0034] Further, the inner wall of the pressure relief sleeve is provided with a switch electrically connected with the driving motor, the side wall of the limiting block is provided with a pressing rod matched with the switch, the switch is a boat-shaped switch, and the end of the pressing rod is provided with an arc surface matched with the key of the boat-shaped switch.

[0035] From the above description, it can be seen that when the sealing plate and the sliding column slide up and down, the limiting block and the pressing rod can slide up and down, thereby driving the pressing rod to contact and push the key of the boat-shaped switch, and finally realizing that the boat-shaped switch can be automatically opened and closed when pressure relief.

[0036] Further, the limiting block is connected with the inner wall of the pressure relief sleeve through the limiting rod.

[0037] From the above description, it can be seen that the limiting block, the sliding column and the sealing plate can slide linearly up and down by the limiting rod, and the resistance is reduced.

[0038] Further, the free end of the limiting rod is provided with a roller.

[0039] From the above description, it can be seen that the frictional resistance between the limiting rod and the rotating sleeve is reduced.

[0040] Further, the inner wall of the rotating sleeve is provided with a sliding hole matched with the sliding column, and the sliding column and the sliding hole are sealingly and slidably connected.

[0041] Further, the rotating sleeve is rotatably connected with the fixed rod through a rotating bearing.

[0042] Please refer to Figures 1 to 4 , the embodiment one of the utility model is:

[0043] Please refer to Figure 1 , 2 and 3, a switch cabinet pressure relief device, including cabinet 1, the top of cabinet 1 is provided with vent 2, the top of cabinet 1 is provided with pressure relief sleeve 3 communicated with vent 2, the inner wall between pressure relief sleeve 3 inner chamber is installed fixed rod 4, sliding column 5 is slidably connected on fixed rod 4, and sliding column 5 passes through fixed rod 4, the top of sliding column 5 is provided with sealing plate 6 matched with pressure relief sleeve 3, the top of fixed rod 4 is rotatably connected with rotating sleeve 7, and one end of sliding column 5 passes through rotating sleeve 7, the outer wall of rotating sleeve 7 is fixedly connected with exhaust fan blade 8, the bottom of sliding column 5 is provided with limiting block 9, the outer wall of fixed rod 4 is provided with spring 10, and spring 10 is located between fixed rod 4 and limiting block 9.

[0044] Please refer to Figure 2 As shown in the figure, the top of the pressure relief sleeve 3 is provided with a pressure relief plate 11, a plurality of pressure relief holes 12 are formed through the pressure relief plate 11, one end of the fixed rod 4 penetrates the pressure relief plate 11 and is connected with the sealing plate 6, the bottom of the sealing plate 6 is provided with a sealing column 601 matched with the pressure relief hole 12, and the outer wall of the sealing column 601 is wrapped with a rubber sleeve.

[0045] Please refer to Figure 3 As shown in the figure, the bottom of the fixed rod 4 is provided with a driving motor 13, the output end of the driving motor 13 penetrates the fixed rod 4 and is provided with a driving gear 14, and the outer wall of the rotating sleeve 7 is provided with a driven gear 15 meshed and connected with the driving gear 14.

[0046] Please refer to Figure 2 and 4 As shown in the figure, the inner wall of the pressure relief sleeve 3 is provided with a switch 16 electrically connected with the driving motor 13, and the side wall of the limiting block 9 is provided with an extrusion rod 18 matched with the switch 16.

[0047] Please refer to Figure 2 As shown in the figure, the switch 16 is a boat-shaped switch, and the end of the extrusion rod 18 is provided with an arc surface matched with the key of the boat-shaped switch.

[0048] Please refer to Figure 4 As shown in the figure, the outer wall of the limiting block 9 and the inner wall of the pressure relief sleeve 3 are connected through a limiting rod.

[0049] Please refer to Figure 4 As shown in the figure, the free end of the limiting rod is provided with a roller 181.

[0050] Please refer to Figure 1 As shown in the figure, the rotating sleeve 7 and the fixed rod 4 are connected through a rotating bearing.

[0051] Please refer to Figure 3 As shown in the figure, the inner wall of the rotating sleeve 7 is provided with a sliding hole matched with the sliding column 5, and the sliding column 5 and the sliding hole are connected in a sealed sliding manner.

[0052] The working process of the above pressure relief device is as follows:

[0053] When the pressure inside the cabinet of the switch 16 increases, the increased pressure will lift the sealing plate 6, the sliding column 5 and the limiting block 9, so that the sealing column 601 on the sealing plate 6 is separated from the pressure relief hole 12, so that the air inside the cabinet 1 can be discharged along the pressure relief hole 12.

[0054] When the limiting block 9 slides upward, the extrusion rod 18 can gradually contact the boat-shaped switch, and the boat-shaped switch is poked to make the driving motor 13 open, the driving motor 13 drives the driven gear 15 and the rotating sleeve 7 to rotate through the driving gear 14, so that the air fan blade 8 starts to rotate, and the air in the cabinet 1 is quickly exhausted, thereby accelerating the pressure relief speed in the cabinet 1.

[0055] After the pressure in the cabinet 1 is relieved, the limiting block 9 gradually descends to the original position under the action of the restoring force of the spring 10, so that the extrusion rod 18 pokes the boat-shaped switch again, thereby closing the driving motor 13, and the sealing column 601 on the sealing plate 6 is inserted into the pressure relief hole 12 again, the sealing of the cabinet 1 is realized, and the external dust is prevented from entering the cabinet 1.

[0056] In summary, the switch cabinet pressure relief device provided by the utility model can lift the sealing plate and the sliding column along the fixed rod by the pressure in the cabinet when the pressure in the cabinet increases, so that the sealing plate is separated from the pressure relief sleeve, thereby making the high-pressure gas in the interior flow to relieve pressure, and when the gas flows to relieve pressure, the air fan blade and the rotating sleeve can be driven to rotate, so that the gas in the cabinet is quickly exhausted through the air fan blade, thereby improving the pressure relief efficiency of the cabinet, making the pressure in the cabinet can be quickly reduced, and safety is ensured.

[0057] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation or direct or indirect application in the related technical field according to the content of the utility model specification and drawings is also included in the patent protection range of the utility model.

Claims

1. A switch cabinet pressure relief device, comprising a cabinet body, characterized in that: A ventilation hole is provided on the top of the cabinet, and a pressure relief sleeve connected to the ventilation hole is installed on the top of the cabinet. A fixed rod is installed between the side walls of the inner cavity of the pressure relief sleeve, and a sliding column is slidably connected to the fixed rod, and the sliding column passes through the fixed rod. A sealing plate that cooperates with the pressure relief sleeve is installed on the top of the sliding column, and a rotating sleeve is rotatably connected to the top of the fixed rod, and one end of the sliding column passes through the rotating sleeve. An exhaust fan blade is fixed to the outer wall of the rotating sleeve, and a limit block is installed at the bottom of the sliding column. A spring is sleeved on the outer wall of the fixed rod, and the spring is located between the fixed rod and the limit block.

2. The switch cabinet pressure relief device according to claim 1, characterized in that: A pressure relief plate is installed on the top of the pressure relief sleeve, and a plurality of pressure relief holes are opened through the pressure relief plate. One end of the fixing rod passes through the pressure relief plate and is connected to the sealing plate. A sealing column that cooperates with the pressure relief hole is installed at the bottom of the sealing plate.

3. The switch cabinet pressure relief device according to claim 2, characterized in that: The outer wall of the sealing column is wrapped with a rubber sleeve.

4. The switch cabinet pressure relief device according to claim 1, characterized in that: A driving motor is installed at the bottom of the fixing rod, an output end of the driving motor passes through the fixing rod and is installed with a driving gear, and a driven gear meshing with the driving gear is installed on the outer wall of the rotating sleeve.

5. The switch cabinet pressure relief device according to claim 4, characterized in that: A switch electrically connected to the drive motor is installed on the inner wall of the pressure relief sleeve, and an extrusion rod cooperating with the switch is provided on the side wall of the limit block.

6. The switch cabinet pressure relief device according to claim 5, characterized in that: The switch is a rocker-shaped switch, and the end of the extrusion rod is provided with a curved surface that cooperates with the button of the rocker-shaped switch.

7. The switch cabinet pressure relief device according to claim 1, characterized in that: The outer wall of the limit block and the inner wall of the pressure relief sleeve are slidably connected via a limit rod.

8. The switch cabinet pressure relief device according to claim 7, characterized in that: The free end of the limiting rod is provided with a roller.

9. The switch cabinet pressure relief device according to claim 8, characterized in that: The inner wall of the rotating sleeve is provided with a sliding hole which cooperates with the sliding post, and the sliding post and the sliding hole are sealed and slidably connected.

10. The switch cabinet pressure relief device according to claim 1, characterized in that: The rotating sleeve and the fixed rod are rotatably connected via a rotating bearing.

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